LED Lighting Spectrum Control With Infrared Sunlight Simulation
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Solution Overview
Problem
Indoor lighting devices lack the ability to mimic the natural sunlight spectrum, which can disrupt human biorhythms due to their limited wavelength range and lack of infrared emission, affecting user health and well-being.
Innovation Solution
A light-emitting apparatus that includes visible light and infrared emitters, controlled by a processor to adjust their characteristics and output a spectrum similar to external light, using optical sensors to acquire and compare light spectra, and store data for adaptive lighting.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If indoor lighting devices use conventional white light sources, then the lighting function is achieved, but the spectrum is limited and does not mimic natural sunlight, disrupting human biorhythms
Solution Approach 1:
The lighting system is divided into multiple independent light sources with different color temperatures (e.g., 6504K daylight simulation, 2856K warm white, and infrared sources). Each light source targets specific wavelength ranges to collectively reproduce the full sunlight spectrum, allowing selective activation based on time of day and user needs.
Solution Approach 2:
The patent combines multiple types of light-emitting components (LED chips with different color temperatures, infrared LEDs, and phosphor conversion materials) to create a composite lighting system. This composite approach enables the generation of a broad spectrum that includes visible light and infrared radiation, mimicking natural sunlight's composition.
2Adaptability or versatility
If the lighting device emits full spectrum light including infrared, then the natural lighting experience is improved, but the device complexity increases due to multiple light sources and control systems
Solution Approach 1:
The controller serves multiple functions: it manages the timing and intensity of different light sources, processes feedback from optical sensors, stores spectral data, and adjusts lighting characteristics to match external conditions. This multi-functionality reduces the need for separate dedicated components for each control task.
Solution Approach 2:
The system uses optical sensors to automatically detect external light conditions and adjusts the indoor lighting spectrum accordingly without user intervention. The controller autonomously compares the emitted light spectrum with stored sunlight spectral data and makes real-time adjustments, enabling the system to self-regulate and maintain optimal spectral output.
3Adaptability or versatility
If the lighting device continuously adjusts spectrum to match external light, then the health benefits are maximized, but the energy consumption increases due to multiple active components
Solution Approach 1:
The lighting system operates in periodic cycles corresponding to day-night rhythms, activating different light sources at different times. During daytime simulation, full-spectrum lights including infrared are activated; during nighttime, only low-intensity warm white or off-state operation is used. This periodic operation aligns with natural circadian patterns while reducing overall energy consumption compared to continuous full-spectrum operation.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The apparatus provides a natural lighting experience by emitting light with a spectrum similar to sunlight, promoting user health by simulating the natural day-night cycle through adjustable visible and infrared light emission.
Implementation Method 1
each of the light sources includes a light-emitting diode chip and a wavelength conversion unit configured to convert a wavelength rage of light emitted from the light-emitting diode chip
Implementation Method 2
an optical sensor configured to sense external light, in which the controller is further configured to acquire a spectrum of the external light by communicating with the optical sensor
Data Source
AI summary
A lighting device including a first light emitter including a plurality of light sources each being configured to emit light with a different color temperature, a second light emitter including at least one light emitting structure to emit light having a different color range than that emitted from the first light emitter, a controller to adjust characteristics of light emitted from the first and second light emitters, a user interface member configured to receive input of a user and connected to the controller, and a storage medium connected to the controller, in which each of the light sources includes a light-emitting diode chip and a wavelength conversion member to convert a wavelength range of light emitted from the light-emitting diode chip, and the controller is further configured to control the first and second light emitters according to a spectrum of light stored in the storage medium.